This swarm of bird (starlings?), that I named a bird city, flies away simultaneously.
And suddenly the tree is released and looks relieved!
This amazing footage was caught in Zaandam, North Holland, The Netherlands. I don’t actually know what kind of birds we are looking at, but this nature spectacle is just incredible.
Look at beautiful pictures of bird flocks.
This is pretty cool, no?
 - dubbed the bird city - flying away simultaneously from a tree which is released and looks relieved! WOW!){kind=link}